Răspuns:
5
Explicație pas cu pas:
(1+2*[1+2*(3+2*5)]-50)
(1+2*[1+2*(3+10)]-50)
(1+2*[1+2*13]-50)
(1+2*[1+26]-50)
(1 +2*27-50)
(1+55-50)
(54-50)